Special case opString for env op.
Add a todo.
Typo in README.
Update to latest chai.
Add charset="utf-8" to script tags, for unicode!
Reference eval by index, for consistency.
Semicolon comments are removed at parse time.
Consolidate definition of public API.
Add meta tag for charset="utf-8" to HTML pages.
Consolidate usage of jQuery.
Correct description of issue.
Change `string` to identify native functions.
Change evaluateForm signature.

- `env` is now the last argument.
- This matches other functions.
Rename parse -> read. (code)
Rename parse -> read. (file)
Make `pp` consistent with `string`.
Expose `read` to the teslo runtime.
Clean up comment parsing.

- Comments are not forms.
- Ensures ';a doesn't parse.
Add an issue about macro expansion.